DMA CONTROLLER, NODE, DATA TRANSFER CONTROL METHOD, AND COMPUTER READABLE RECORDING MEDIUM FOR RECORDING PROGRAM

摘要

DMA controller 14 of the transmission control unit (14a) is a self- node (10) (11) (firmware) and data messages in accordance with the request from the serial bus (1) , and transmits it to the switch (2) any other node (3) via the like. At that time , the firmware is a flag indicating " whether there is a need to wait for a response from the data transfer destination " data or messages and stores the descriptor , but if the request for message transmission in the descriptor to be sent to the memory 12 is included . Transmission control section (14a) is a flag is turned on (ON) was the case, without waiting for completion of the response from the transmission destination node (3) , immediately performs a completion notification to the false with respect to the firmware .